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You searched for: subject:"finite element method"
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[texts]What Is a Good Linear Finite Element? - Jonathan
Why are elements with tiny angles harmless for interpolation, but deadly for stiffness matrix conditioning? Why are long, thin elements with angles near 180o terrible in isotropic cases but perfectly acceptable, if they're aligned properly, for anisotropic PDEs whose solutions have anisotropic curvature? Why do elements that are too long and thin sometimes offer unexpectedly accurate PDE solutions? Why can interpolation error, discretization error, and stiffness matrix conditioning sometimes hav...
Keywords: Finite element method
Downloads: 42
[texts]Evaluation of flood risk factors in the design of highway stream crossings : V.3, Finite element model for bridge backwater computation - Water Resources Engineers, Inc
PB 254 960/AS
Keywords: Finite element method; Hydraulics
Downloads: 66
[texts]On the axiomatic foundations of dimensional analysis - Gawain, Theodore Henry.
Title from cover
Keywords: FINITE ELEMENT METHOD--COMPUTER PROGRAMS
Downloads: 96
[texts]Design of Pipelines Against Ice Scour: Effects of Seabed Geology
In recent years, several computational models were published for the analysis of pipelines subjected to ice scour. With one exception, most of these models assumed uniform seabed soil properties. This paper studies the effects of different seabed soil stratigraphies on the ice scour process. Influence of various stiffer and softer soil sequences on the pipeline stresses are analyzed. Effects of reworking or remolding of soils by recurrent scours are studied...
Keywords: Pipelines; Ice Scour; Finite Element Method
Downloads: 20
[texts]The generalized element method (Volume Report (University of Illinois at Urbana-Champaign. Dept. of Computer Science) no. 946) - Speelpenning, B
"COO-2383-0055."
Keywords: Equations, Simultaneous; Matrices; Finite element method
Downloads: 39
[texts]Effects of cavitation on underwater shock loading - plane problem : final report - Newton, R. E. (Robert Eugene)
Final report for period October 1979-September 1980.
Keywords: GIRDERS--VIBRATION--MATHEMATICAL MODELS; FINITE ELEMENT METHOD
Downloads: 66
[texts]An efficient iterative procedure for use with the finite element method (Volume Report (University of Illinois at Urbana-Champaign. Dept. of Computer Science) no. 600) - Kim, Yong-jip, 1935-
Vita
Keywords: Differential equations, Elliptic; Finite element method
Downloads: 267
[texts]9. Eng The Modernization Of Gear Micropump Casing With The Use Of Finite Waclaw Kollek - Wacław Kollek & Urszula Radziwanowska
This paper presents the results of modernization of gear micropump casing in order to achieve minimization of overall dimensions and mass of the construction. Three different cases of the pump casing size were analyzed during numerical simulations with the use of finite element method (FEM). The dimensions of the first of the casings were identical to prototype unit, the second model was characterized by 15% reduction in size and the third casing was reduced by 25%...
Keywords: Gear Micropump; Pump Casing; Finite Element Method
Downloads: 6
[texts]Simulations of molecules and processes in the synapse (slides) - Kaihsu Tai
Slides for the defense of doctoral dissertation by Kaihsu Tai; Department of Chemistry and Biochemistry, University of California, San Diego, 2002.
Keywords: acetylcholinesterase; fasciculin; finite element method; molecular dynamics; neuromuscular junction
Downloads: 97
[texts]Laser Incident in the NASA Unitary Plan Wind Tunnel - George, Michael W.
A viewgraph presentation describing the laser incident in the NASA Unitary Plan Wind Tunnel (UPWT) is shown. The topics include: 1) Unitary Plan Wind Tunnel (UPWT); 2) UPWT 11' x 11' Transonic Wind Tunnel; 3) UPWT 9' x 7' Supersonic Wind Tunnel; 4) 3D Particle Image Velocimetry (PIV); 5) PIV System in 11' x 11' Transonic Test Section; 6) PIV installation in 11' x 11' TWT; 7) 3 Space Shuttle Ascent Configuration Test in UPWT 9' x 7' Test Section; 8) PIV installation in 9' x 7' SWT; 9) PIV Laser S...
Keywords: SOLAR SAILS; ACTUATORS; CONTROLLERS; AEROSPACE SYSTEMS; FINITE ELEMENT METHOD; STABILITY
Downloads: 100
[texts]Effect of the Human Eye Cornea Material Property on Measurement of the Intraocular Eye Pressure Utilizing Goldmann Applanation Tonometer
A quarter 3D model of cornea-aqueous humoremploying elastic anisotropic formulation in collaborationwith Goldmann appalanation tonometer (GAT) action isinvestigated in order to examine the relation between thematerial property variation and the deviation from the truepressure inside the human eye utilizing finite elementmethod. In addition to that, the effect of the corneal thicknessvariation has also been studied...
Keywords: intraocular pressure; tonometer; corneal thickness; anisotropy; finite element method
Downloads: 19
[texts]Analysis of a two-fluid EHD power generator including effects of compressibility - Gawain, Theodore Henry.;Biblarz, Oscar.
Title from cover
Keywords: DIFFERENTIAL EQUATIONS--NUMERICAL SOLUTIONS; FINITE ELEMENT METHOD; MATRICES
Downloads: 46
[texts]Optimum design of a ceramic tensile creep specimen using a finite element method (Volume 102) - Wang, Z
Journal of Research of the National Institute of Standards and Technology
Keywords: optimum design; ceramics; finite element method; stress analysis; stress relaxation
Downloads: 105
[texts]Observational Requirements for High-Fidelity Reverberation Mapping - Horne, Keith
We present a series of simulations to demonstrate that high-fidelity velocity-delay maps of the emission-line regions in active galactic nuclei can be obtained from time-resolved spectrophotometric data sets like those that will arise from the proposed Kronos satellite. While previous reverberation-mapping experiments have established the size scale R of the broad emission-line regions from the mean time delay tau = R/c between the line and continuum variations and have provided strong evidence ...
Keywords: CONCURRENT PROCESSING; FINITE ELEMENT METHOD; DISPLACEMENT; FACTORIZATION; OPTIMIZATION; ALTERNATIVES; COMPUTERS
Downloads: 90
[texts]Ball motion in a ball-obturated tubular projectile - Nunn, R. H. (Robert H.);Bloomer, James Wayne.
Final report for period ending 31 December, 1980.
Keywords: ORDNANCE TESTING--MATHEMATICAL MODELS; GUNNERY--MATHEMATICAL MODELS; FINITE ELEMENT METHOD
Downloads: 78
[texts]A modal analysis of the violin using MSC/NASTRAN and PATRAN - Knott, George Anthony.
Thesis (M.S. in Engineering Acoustics) Naval Postgraduate School, March 1987
Keywords: Computer-aided design; Finite element method--Computer programs; Computer simulation
Downloads: 532
[texts]Simulation of an Austenite-twinned-Martensite interface (Volume 108) - Kearsley, A.J.
Journal of Research of the National Institute of Standards and Technology
Keywords: finite element method; Austenite-Martensite interface; quasi-Newton method
Downloads: 95
[texts]Simulations of molecules and processes in the synapse - Kaihsu Tai
Doctoral dissertation by Kaihsu Tai; Department of Chemistry and Biochemistry, University of California, San Diego, 2002. (ISBN 0-493-90932-X)
Keywords: acetylcholinesterase; fasciculin; finite element method; molecular dynamics; neuromuscular junction
Downloads: 385
[texts]The Navy's educational programs in electronic warfare - Hoisington, D. B. (David B.);Thomas, C.J.
Title from cover
Keywords: NUMERICAL WEATHER FORECASTING--MATHEMATICAL MODELS; FINITE ELEMENT METHOD; BAROTROPIC MODELS
Downloads: 61
[texts]Measuring Directional Wave Spectra and Wind Speed with a Scanning Radar Altimeter - Walsh, E. J.
The geometry for the NASA Scanning Radar Altimeter (SRA) is shown. It transmits a 8-ns duration pulse at Ka-band (8.3 mm) and measures time of flight as it scans a 1 degree (two-way) beam from left to right across the aircraft ground track. The most recent configuration determines the surface elevation at 64 points spaced at uniform angular intervals of about 0.7 across a swath whose width is about 0.8 times the aircraft altitude...
Keywords: PIEZOELECTRICITY; ACTUATORS; FINITE ELEMENT METHOD; DISPLACEMENT; ELECTRIC POTENTIAL; ANALOGIES; THICKNESS
Downloads: 96
[texts]NASA Patent Abstracts Bibliography: A Continuing Bibliography - NON
This report lists NASA patent abstracts recently announced in the NASA STI Database.
Keywords: CLOCKS; BOUNDARY CONDITIONS; ACCURACY; FINITE ELEMENT METHOD; SYSTEMATIC ERRORS
Downloads: 180
[texts]Finite element modeling of static indentation damage in laminated composites - Jung, Han Soo
Typescript
Keywords: Laminated materials; Composite materials; Composite materials; Finite element method
Downloads: 276
[texts]Design and analysis of a multi-backend database system for performance improvement, functionality expansion and capacity growth. part I - Hsiao, David K., 1933-;Menon, M. Jaishankar.
Title from cover
Keywords: FINITE ELEMENT METHOD; GEOSTROPHIC CURRENTS; ATMOSPHERIC PHYSICS--MATHEMATICAL MODELS
Downloads: 57
[texts]Integrated approach to cavity system seismic evaluation - Dendrou, Basile
Final report;issued October 1978
Keywords: Earthquakes; Underground construction; Rock mechanics; Finite element method
Downloads: 74
[texts]Application of a hybrid generation/utility assessment heuristic to a class of scheduling problems - Heyward, Ann O
A two-stage heuristic solution approach for a class of multiobjective, n-job, 1-machine scheduling problems is described. Minimization of job-to-job interference for n jobs is sought. The first stage generates alternative schedule sequences by interchanging pairs of schedule elements. The set of alternative sequences can represent nodes of a decision tree; each node is reached via decision to interchange job elements...
Keywords: FINITE ELEMENT METHOD; SHELLS (STRUCTURAL FORMS); STRESS ANALYSIS; STRUCTURAL STABILITY; FUNCTIONS (MATHEMATICS); MATHEMATICAL MODELS; NUMERICAL ANALYSIS
Downloads: 66
[texts]Safer Liquid Natural Gas - NON
After the disaster of Staten Island in 1973 where 40 people were killed repairing a liquid natural gas storage tank, the New York Fire Commissioner requested NASA's help in drawing up a comprehensive plan to cover the design, construction, and operation of liquid natural gas facilities. Two programs are underway. The first transfers comprehensive risk management techniques and procedures which take the form of an instruction document that includes determining liquid-gas risks through engineering...
Keywords: CERAMICS; FINITE ELEMENT METHOD; SILICON NITRIDES; THERMAL STRESSES; TURBINE ENGINES; COATINGS; TEMPERATURE EFFECTS; THERMAL CONDUCTIVITY
Downloads: 20
[texts]New Reduced Two-Time Step Method for Calculating Combustion and Emission Rates of Jet-A and Methane Fuel With and Without Water Injection - Molnar, Melissa
A simplified kinetic scheme for Jet-A, and methane fuels with water injection was developed to be used in numerical combustion codes, such as the National Combustor Code (NCC) or even simple FORTRAN codes that are being developed at Glenn. The two time step method is either an initial time averaged value (step one) or an instantaneous value (step two). The switch is based on the water concentration in moles/cc of 1x10(exp -20)...
Keywords: SOLAR SAILS; MEMBRANE STRUCTURES; GRAVITATIONAL EFFECTS; KAPTON (TRADEMARK); INFLATABLE SPACE STRUCTURES; PHOTOGRAMMETRY; FINITE ELEMENT METHOD
Downloads: 94
[texts]Surface Flow Visualization on a Hovering Tiltrotor Blade - Yamauchi, Gloria K.
Fluorescent mini-tufts were used to visualize the flow behavior on the upper surface of the blade of a full-scale, hovering XV-15 tiltrotor installed in the Ames 80- by 120-Foot Wind Tunnel. The objectives of the test were to determine whether the flow direction could be deduced from the tuft motion and whether this visualization technique could be practically implemented for forward flight. A dual camera/strobe system was used to acquire inboard and outboard images of approximately 2500 tufts o...
Keywords: STRESS CONCENTRATION; SOLAR SAILS; FINITE ELEMENT METHOD; THIN FILMS; WRINKLING; DEFORMATION; COMPUTATIONAL GRIDS; MEMBRANES; NONLINEARITY
Downloads: 25
[texts]Defining Earth System Enterprise Information Needs and Pilot Programs for Utilization by Local Government in the Eastern US - Brower, Robert N
This report profiles 13 objectives of the grant it covers, and summarizes significant findings or accomplishments.
Keywords: CERAMIC MATRIX COMPOSITES; STRESS ANALYSIS; STRUCTURAL ANALYSIS; STRUCTURAL FAILURE; FINITE ELEMENT METHOD; BUCKLING; SHEAR; PROBABILITY THEORY
Downloads: 76
[texts]LIFE AND WORK ONBOARD A SPACE STATION - PESTOV, I
THE DAILY ROUTINE OF THE COSMONAUTS IS REVIEWED AND THEIR MEDICAL AND EXERCISE PROGRAM IS DISCUSSED. THE COSMONAUT'S WORKING DAY BEGAN AT ABOUT 9:00 A.M. AND ENDED AT ABOUT 1:00 A.M. THE MEDICAL EQUIPMENT USED INCLUDED: POLINOM FOR RECORDING EKG; ARTERIAL RESEDA FOR DETERMINING PULMONARY VENTILATION AND VOLUME; AND IMPULS FOR EVALUATING VESTIBULAR APPARATUS FUNCTION BY DETERMINING THRESHOLD AMOUNTS OF ELECTRICAL STIMULATION CREATING AN ILLUSION OF PITCHING...
Keywords: FINITE ELEMENT METHOD; LIQUID ROCKET PROPELLANTS; LIQUID SLOSHING; COMPUTER TECHNIQUES; INTERFACIAL TENSION; TANK GEOMETRY; VIBRATION MODE
Downloads: 90
[texts]An RXTE Study of M87 and the Core of the Virgo Cluster - Reynolds, Christopher S.
We present hard X-ray observations of the nearby radio galaxy M87 and the core of the Virgo cluster using the Rossi X-ray 7Tming Explorer. These are the first hard X-ray observations of M87 not affected by contamination from the nearby Seyfert 2 galaxy NGC 4388. Thermal emission from Virgo's intracluster medium is clearly detected and has a spectrum indicative of kT is approximately equal to 2.5 keV plasma with approximately 25% cosmic abundances...
Keywords: LOADS (FORCES); LOGISTICS; SPACE SHUTTLE PAYLOADS; FINITE ELEMENT METHOD; DYNAMIC MODELS; TRANSPORTATION; SPACE STATIONS; PROVING; INTEGRATORS
Downloads: 92
[texts]Efficient algorithms for dilated mappings of binary trees - Iqbal, M. Ashra
The problem is addressed to find a 1-1 mapping of the vertices of a binary tree onto those of a target binary tree such that the son of a node on the first binary tree is mapped onto a descendent of the image of that node in the second binary tree. There are two natural measures of the cost of this mapping, namely the dilation cost, i.e., the maximum distance in the target binary tree between the images of vertices that are adjacent in the original tree...
Keywords: BARS; DELAMINATING; FINITE ELEMENT METHOD; SANDWICH STRUCTURES; STRESS CONCENTRATION; ANISOTROPY; ASPECT RATIO; ELASTIC PROPERTIES; FAILURE ANALYSIS
Downloads: 87
[texts]Flow control through the use of topography (Volume 112) - Kearsley, A. J.
Journal of Research of the National Institute of Standards and Technology
Keywords: finite element method; complex boundary; Taylor-Couette flow; optimization; flow control; fluid dynamics
Downloads: 137
[texts]A Convex Approach to Fault Tolerant Control - Maghami, Peiman G.
The design of control laws for dynamic systems with the potential for actuator failures is considered in this work. The use of Linear Matrix Inequalities allows more freedom in controller design criteria than typically available with robust control. This work proposes an extension of fault-scheduled control design techniques that can find a fixed controller with provable performance over a set of plants...
Keywords: FINITE ELEMENT METHOD; ALUMINUM; TEST STANDS; CYLINDRICAL BODIES; MATHEMATICAL MODELS; INTERNAL PRESSURE; STIFFNESS; PRESSURE MEASUREMENT
Downloads: 106
[texts]On the development of computer programs for the stress analysis of shear walls using Hermitian interpolation - Lee, Ki-Jang.
This volume was digitized and made accessible online due to deterioration of the original print copy.
Keywords: Finite element method--Computer programs; Structural analysis (Engineering)--Matrix methods; Structural stability
Downloads: 190
[texts]Medusa Sea Floor Monitoring System - Flynn, Michae
This paper presents viewgraphs on the development of an instrument to enable fundamental research into understanding the potential for and limits to chemolithoautrophic life. The topics include: 1) Background; 2) Relevance to NASA Missions; 3) Technology Requirements; 4) Medusa System Description; 5) Medusa Components; 6) Medusa Science Capabilities; 7) Medusa Capabilities; and 8) Schedule
Keywords: ELECTROMAGNETIC SCATTERING; FINITE ELEMENT METHOD; WIRE; NUMERICAL ANALYSIS; SPHERES; RADAR CROSS SECTIONS; MULTISTATIC RADAR; SIMULATION
Downloads: 66
[texts]Two Versions of Bitonic Sorting Algorithms on the Connection Machine - Tung, Yu-Wen
Communication is a major cost item for many algorithms on today's parallel computers. Therefore, reducing the communication requirements in an algorithm often results in an improvement to the original algorithm. In this paper, we show two versions of bitonic sorting algorithms on the Connection Machine obtained this way. The first is a version of bitonic sort modified from a standard implementation for hypercube machines...
Keywords: RESEARCH FACILITIES; ROTOR DYNAMICS; MATHEMATICAL MODELS; BEARINGS; ENGINE DESIGN; SIMULATION; FOIL BEARINGS; FINITE ELEMENT METHOD; BACKUPS
Downloads: 23
[texts]Federal R and D Reductions, Market Share, and Aerospace Information Usage - Rocker, JoAnne
Reductions in federally funded research have a rippling effect over the entire aerospace industry. The decline in federal R&D spending in aerospace in recent years coincides with declines in U.S. aerospace market share, One of the lesser-understood factors in the declining U.S. market share may be the differing ways and intensity with which the U.S. and its competitors approach another trend, the increasing availability of large amounts of aerospace research information on the World Wide Web...
Keywords: FINITE ELEMENT METHOD; HYPERBOLIC DIFFERENTIAL EQUATIONS; HYPERBOLIC FUNCTIONS; NUMERICAL ANALYSIS; POLYNOMIALS; UNSTRUCTURED GRIDS (MATHEMATICS); GALERKIN METHOD
Downloads: 84
[texts]Rapid solution of finite element equations on locally refined grids by multi-level methods (Volume Report (University of Illinois at Urbana-Champaign. Dept. of Computer Science) no. 1021) - Van Rosendale, John R
"UILU-ENG 80 1712."
Keywords: Boundary value problems; Finite element method; Iterative methods (Mathematics); Differential equations, Elliptic
Downloads: 76
[texts]Navigation Concepts for the James Webb Space Telescope - Long, Anne
This paper evaluates the performance that can be achieved using candidate ground and onboard navigation approaches for operation of the James Webb Space Telescope, which will be in an orbit about the Sun-Earth L2 libration point. The ground navigation approach processes standard range and Doppler measurements from the Deep Space Network The onboard navigation approach processes celestial object measurements and/or ground-to- spacecraft Doppler measurements to autonomously estimate the spacecraft...
Keywords: PARALLEL COMPUTERS; STRUCTURAL ANALYSIS; FINITE ELEMENT METHOD; STIFFNESS MATRIX; AIRCRAFT STRUCTURES; AIRCRAFT MODELS; COMPUTATION
Downloads: 87
[texts]A flexible flight display research system using a ground-based interactive graphics terminal - Hatfield, J. J.
Requirements and research areas for the air transportation system of the 1980 to 1990's were reviewed briefly to establish the need for a flexible flight display generation research tool. Specific display capabilities required by aeronautical researchers are listed and a conceptual system for providing these capabilities is described. The conceptual system uses a ground-based interactive graphics terminal driven by real-time radar and telemetry data to generate dynamic, experimental flight displ...
Keywords: COMPUTER GRAPHICS; INTERACTIONS; SOLIDS; STRUCTURAL ANALYSIS; COMPUTER PROGRAMS; FINITE ELEMENT METHOD; INPUT/OUTPUT ROUTINES
Downloads: 74
[texts]Serrated-Planform Lifting-Surfaces - NON
A set of serrated-planform lifting surfaces is provided which produces unexpectedly high lift coefficients at moderate to high angles-of-attack. Each serration, or tooth, is designed to shed a vortex. The interaction of the vortices greatly enhances the lifting capability over an extremely large operating range. Variations of the invention use serrated-planform lifting surfaces in planes different than that of a primary lifting surface...
Keywords: TETHERING; FINITE ELEMENT METHOD; TOWED BODIES; COMPUTER PROGRAMS; STRUCTURAL ANALYSIS; GLIDERS; METEOROLOGICAL PARAMETERS; FLIGHT ALTITUDE; CABLES
Downloads: 114
[texts]Investigation of Sea-Level Performance of I-16 Turbojet Engine at Zero Ram with XFR-1 Intake Duct Shroud, and Tail Pipe - Dowman, Harry W.
The sea-level performance of I-16 turbojet engine at zero ram was investigated to determine the effects of an intake duct, shroud, and tail pipe intended for installation in an XFR-1 airplane. Engine speeds ranged from 8000 to 16,500 rpm for several variations of the intake duct and tail pipes.
Keywords: MEMBRANE STRUCTURES; SOLAR SAILS; WRINKLING; MODELS; NONLINEARITY; COMPUTER PROGRAMS; FINITE ELEMENT METHOD; DEFORMATION; LAGRANGIAN FUNCTION
Downloads: 80
[texts]The national land use data program of the US Geological Survey - Anderson, J. R.
The Land Use Data and Analysis (LUDA) Program which provides a systematic and comprehensive collection and analysis of land use and land cover data on a nationwide basis is described. Maps are compiled at about 1:125,000 scale showing present land use/cover at Level II of a land use/cover classification system developed by the U.S. Geological Survey in conjunction with other Federal and state agencies and other users...
Keywords: COMPUTER GRAPHICS; FINITE ELEMENT METHOD; MATRICES (MATHEMATICS); NODES (STANDING WAVES); NUMERICAL ANALYSIS; COMPUTER PROGRAMS; FORTRAN; SYMMETRY
Downloads: 80
[texts]Intelligent Automation Approach for Improving Pilot Situational Awareness - Spirkovska, Lill
Automation in the aviation domain has been increasing for the past two decades. Pilot reaction to automation varies from highly favorable to highly critical depending on both the pilot's background and how effectively the automation is implemented. We describe a user-centered approach for automation that considers the pilot's tasks and his needs related to accomplishing those tasks. Further, we augment rather than replace how the pilot currently fulfills his goals, relying on redundant displays ...
Keywords: MAGNETOACOUSTICS; FINITE ELEMENT METHOD; MATHEMATICAL MODELS; RAIL TRANSPORTATION; WHEELS; MAGNETIZATION; RESIDUAL STRESS; STRESS MEASUREMENT
Downloads: 79
[texts]Structural analysis of 0.105-scale Apollo wind tunnel model (FS-2) - NON
No Abstract Available
Keywords: CONFERENCES; NASTRAN; STRUCTURAL ANALYSIS; DYNAMIC CHARACTERISTICS; FINITE ELEMENT METHOD; STATIC TESTS; STRESS ANALYSIS; SUBSTRUCTURES
Downloads: 119
[texts]524
Finite Element Analysis (FEA) using Finite Element Method (FEM) wasdeveloped over 70 years to solve the complex elasticity and structural analysis problem incivil and aeronautical engineering. Application of FEA is being expanded to simulation inelectrical engineering also to solve the complex design problems. The circuit theory modelsfor designing transformers are not much accurate in determining the transformerparameters such as winding impedance, leakage inductance, hot spot temperature etc...
Keywords: Finite Element Method; Finite Element Analysis; Quasi-static Finite Element; Leakage Inductance
Downloads: 10
[texts]Characteristics of Heavy Summer Rainfall in Southwestern Taiwan in Relation to Orographic Effects - Chen, Ching-Sen
On the windward side of southwestern Taiwan, about a quarter to a half of all rainfall during mid-July through August from 1994 to 2000 came from convective systems embedded in the southwesterly monsoon flow. k this study, the causes of two heavy rainfall events (daily rainfall exceeding 100 mm day over at least three rainfall stations) observed over the slopes and/or lowlands of southwestern Taiwan were examined...
Keywords: TORSION; EDGE CRACKS; PERFORMANCE TESTS; LAMINATES; COMPOSITE MATERIALS; DELAMINATING; DISPLACEMENT; FINITE ELEMENT METHOD; FRACTURE STRENGTH
Downloads: 74
[texts]Spur gears: Optimal geometry, methods for generation and Tooth Contact Analysis (TCA) program - Litvin, Faydor L.
The contents of this report include the following: (1) development of optimal geometry for crowned spur gears; (2) methods for their generation; and (3) tooth contact analysis (TCA) computer programs for the analysis of meshing and bearing contact on the crowned spur gears. The method developed for synthesis is used for the determination of the optimal geometry for crowned pinion surface and is directed to reduce the sensitivity of the gears to misalignment, localize the bearing contact, and gua...
Keywords: CONFERENCES; NASTRAN; STRUCTURAL ANALYSIS; DYNAMIC STRUCTURAL ANALYSIS; FINITE ELEMENT METHOD; STATIC STABILITY
Downloads: 267
[texts]Algebraic surface design and finite element meshes - Bajaj, Chandrajit L
Some of the techniques are summarized which are used in constructing C sup 0 and C sup 1 continuous meshes of low degree, implicitly defined, algebraic surface patches in three dimensional space. These meshes of low degree algebraic surface patches are used to construct accurate computer models of physical objects. These meshes are also used in the finite element simulation of physical phenomena (e.g., heat dissipation, stress/strain distributions, fluid flow characteristics) required in the com...
Keywords: DYNAMIC STRUCTURAL ANALYSIS; FORCED VIBRATION; FREE VIBRATION; STIFFNESS MATRIX; DISPLACEMENT; FINITE ELEMENT METHOD; THEOREMS
Downloads: 134
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